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CS4281-CQ Datenblatt(PDF) 11 Page - Cirrus Logic |
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CS4281-CQ Datenblatt(HTML) 11 Page - Cirrus Logic |
11 / 36 page DS308PP4 11 CS4281 CrystalClear™ PCI Audio Interface CIRRUS LOGIC PRODUCT DATA SHEET HOST INTERFACE The CS4281 host interface is comprised of two separate interface blocks which are memory mapped into host address space. The interface blocks can be located anywhere in the host 32-bit physical address space. The interface block locations are defined by the addresses programmed into the two Base Address Regis- ters in the PCI Configuration Space. These base addresses are normally set up by the system’s Plug and Play BIOS. The first interface block (Base Address 0) contains the general purpose configuration, control, and status registers for the device. The second interface block (Base Address 1) maps the FIFO RAMs into host memory space. The relationship between the Base Address Registers in the CS4281 PCI Configura- tion Space and the host memory map is depicted in Figure 8. The bus mastering PCI bus interface complies with the PCI Local Bus Specification (version 2.1). Host Memory North Bridge CPU South Bridge PCI Bus CS4298 DAA Telephone Line CS4281 PCI Audio Interface PC/PCI (if used) Audio Out Audio In AC-Link Figure 7. Modem Scenario 00h Device ID / Vendor ID Status / Command Class Code / Revision Base Address Register 0 Base Address Register 1 Misc. Control (Memory Mapped, 4 kByte) Device PCI Config. Space 04h 08h 0Ch 10h 14h Direct Registers Direct Memory Interface (Memory Mapped, 6 kByte) 4 Figure 8. Host Interface Base Address Registers |
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Ähnliche Beschreibung - CS4281-CQ |
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